Filter your water year after year with the MSR MiniWorks Ex Water Filter. Clean this lightweight, compact filter back to like-new condition, without any disassembly tools. The MiniWorks' ceramic element ensures long-lasting protection against bacteria, protozoa (including crypto and giardia), and particulate, and the carbon core removes yucky tastes. MSR's little wonder (7. 5 x 2. 75in) can filter up to 1 liter per minute. As a bonus, the MiniWorks Ex Water Filter screws onto a standard Nalgene bottle or any MSR dromedary bag.